1dpkg-mergechangelogs(1) dpkg suite dpkg-mergechangelogs(1)
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6 dpkg-mergechangelogs - 3-way merge of debian/changelog files
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9 dpkg-mergechangelogs [option...] old new-a new-b [out]
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12 This program will use the 3 provided versions of the Debian changelog
13 to generate a merged changelog file. The resulting changelog is stored
14 in the file out or output to the standard output if that parameter is
15 not given.
16 Each entry is identified by its version number and they are assumed to
18 be not conflicting, they are simply merged in the right order (by
19 decreasing version number). When --merge-prereleases is used, the part
20 of the version number after the last tilde is dropped so that
21 1.0-1~exp1 and 1.0-1~exp5 are considered to be the same entry. When the
22 same version is available in both new-a and new-b, a standard line-
23 based 3-way merge is attempted (provided that the module
24 Algorithm::Merge is available — it's part of the package libalgorithm-
25 merge-perl — otherwise you get a global conflict on the content of the
26 entry).
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29 --merge-unreleased
30 Ignore the version number when the entries are marked as UNRELEASED
31 (since dpkg 1.21.0).
32 This is useful when you have diverging development for versions
34 that have not yet been released. For instance 2.1-1 is released,
35 then development happens for the new 2.2-1 and then for 2.3-1,
36 where it makes sense to just end with a coalesced entry for 2.3-1
37 including all the development done in 2.2-1.
38 -m, --merge-prereleases
40 Drop the part after the last tilde in the version number when doing
41 version comparison to identify if two entries are supposed to be
42 the same or not.
43 This is useful when you keep using the same changelog entry but you
45 increase its version number regularly. For instance, you might have
46 2.3-1~exp1, 2.3-1~exp2, ... until the official release 2.3-1 and
47 they are all the same changelog entry that has evolved over time.
48 --help
50 Show the usage message and exit.
51 --version
53 Show the version and exit.
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56 DPKG_COLORS
57 Sets the color mode (since dpkg 1.18.5). The currently accepted
58 values are: auto (default), always and never.
59 DPKG_NLS
61 If set, it will be used to decide whether to activate Native
62 Language Support, also known as internationalization (or i18n)
63 support (since dpkg 1.19.0). The accepted values are: 0 and 1
64 (default).
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67 Anything that is not parsed by Dpkg::Changelog is lost during the
68 merge. This might include stuff like comments which were not supposed
69 to be there, etc.
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72 If you want to use this program to merge Debian changelog files in a
73 git repository, you have first to register a new merge driver in
74 .git/config or ~/.gitconfig:
75 [merge "dpkg-mergechangelogs"]
77 name = debian/changelog merge driver
78 driver = dpkg-mergechangelogs -m %O %A %B %A
79 Then you have to setup the merge attribute for the debian/changelog
81 file either in .gitattributes in the repository itself, or in
82 .git/info/attributes:
83 debian/changelog merge=dpkg-mergechangelogs
851.21.9 2022-07-01 dpkg-mergechangelogs(1)